Container for electromagnetic cookers

Abstract

Problem to provide a container for an electromagnetic cooker which can be heated corresponding to impedance check frequency which differs depending on a manufacturer of an electromagnetic cooker or the like, can properly and easily set a heat generation characteristic, is excellent in marketability, configuration in use, disposability, handiness in cooking and the like, is suitable for retort foods, instant foods and the like, and exhibits high heating efficiency, means for resolution a container for an electromagnetic cooker includes a container body made of a non-conductive material and a conductive layer in a bottom portion of the container, wherein the ratio of resistance change (R−R0) / R0 of the conductive layer with respect to the impedance check frequency of a heating coil is set to 5.3 or more, and a ratio of inductance change (L−L0) / L0 of the conductive layer with respect to the impedance check frequency of the heating coil is set to −0.17 or less. Here, R indicates the high-frequency resistance (.OMEGA.) on a heating coil side with a load, R0 indicates the high-frequency resistance (.OMEGA.) on the heating coil side without a load, L indicates the inductance (.mu.H) on the heating coil side with a load, and L0 indicates the inductance (.mu.H) on the heating coil side without a load.

Description

TECHNICAL FIELD[0001]The present invention relates to a container for an electromagnetic cooker which can heat a content using Joule heat which is generated by an eddy current induced by an electromagnetic induction coil of the electromagnetic cooker.BACKGROUND ART[0002]Recently, an electromagnetic cooker which does not generate flames has been used in a household, a place that serves food and drink such as a restaurant or the like for cooking foods or heating cooked foods from a viewpoint of safety, cleanliness, convenience and economy. The electromagnetic cooker heats food in a container such that, when a container for an electromagnetic cooker made of steel or stainless steel is placed on the electromagnetic cooker, an eddy current is generated in a bottom portion of the container for an electromagnetic cooker due to lines of magnetic force from an electromagnetic coil, and this eddy current induces Joule heat which is used for heating the food in the container.[0003]Further, by ...

AI Technical Summary

Benefits of technology

[0028]According to the container for an electromagnetic cooker of the present invention, the container can be heated corresponding to the oscillation conditions (impedance check frequency intrinsic to the manufacturer) of the electromagnetic cooker which differs for respective manufactures and, at the same time, the heat generation properties of the container can be properly and easily set thus enabling the acquisition of the electromagnetic cooker having high heating efficiency suitable for retort foods, instant foods and the like at a low cost.

[0029]Further, it is possible to provide the container for an electromagnetic cooker which is excellent in marketability, configuration in use, disposability, handiness in cooking and the like.

Problems solved by technology

However, in heating the instant-food-use containers by the conventional electromagnetic cooker described in the above-mentioned patent documents or the like, the instant-food-containers have following drawbacks.

However, to take the fact that the instant-food-container is used for an instant food into consideration, such constitution pushes up a material cost and a forming cost and hence, the container is not economical.

Further, with respect to impedance check frequency for determining whether or not an electromagnetic cooker can be heated, it is difficult to adjust a thickness or the configuration of a heat generating body, a distance from a heating coil or the like and hence, it is difficult to properly and easily set the heat generation properties.

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